GPU Tutorial/Open MP

This video discusses the SAXPY via Open MP GPU offloading. OpenMP 4.0 and later enables developers to program GPUs in C/C++ and Fortran by means of OpenMP directives. In this tutorial we present the basic OpenMP syntax for GPU offloading and give a step-by-step guide for implementing SAXPY with it.

Quiz

1. Which one of the following OpenMP directives can create a target region on GPU?

	`#pragma omp target gpu`
	`#pragma omp target acc`
	`#pragma omp target`

2. The OpenMP `map(to:...)` clause maps variables:

	from host to device data environment before execution
	from host to device data environment after execution
	from device to host data environment before execution
	from device to host data environment after execution

3. Which one of the following OpenMP directives can initialize a league of teams for execution on GPU?

	`#pragma omp init teams`
	`#pragma omp teams`
	`#pragma omp gpu teams`

4. Which one of the following OpenMP directives can distribute iterations of for-loop across GPU threads in the teams?

	`#pragma omp distribute for`
	`#pragma omp parallel for`
	`#pragma omp distribute parallel for`